/**
 * SDK 基础字段定义表
 * base.outer：上报日志基础结构定义
 * base.xcontext:上报报文找中xcontext下的共有字段定义
 * $开头的字段为各个事件特殊拥有字段
 */
export default {
	"$webstay": {
        "xcontext": [
            "$referrer",
            "$referrer_domain",
            "$title",
            "$url",
            "$viewport_width",
            "$viewport_position",
            "$viewport_height",
            "$event_duration",
            "$device_type",
            "$session_id",
            "$is_time_calibrated",
            "$is_first_day"
        ]
    }
}